When I was younger, I often heard about children becoming sick shortly after their younger ones were born. I saw it as a mythical thing. I however had reason for pondering over the issue after my wife gave birth a few days ago.
Roughly some 48 hours after giving birth to our child- a baby boy, the second child who is also a boy, came down with a high temperature. The irony of the thing is that the boy with the temperature has hardly been sick most of his three-and-some-months years.
I still consider the development as mere coincidence, but I know many people out there may think otherwise.
Perhaps some of the experts- scientific or otherwise, on NL could shed more light on the matter?

Its a myth . Because when I was pregnant with my second son, my first son was 8 months old and He never fell sick even after giving birth.

what you believe works for you